Home / 128,124,679.23-176,811,114.40-69,385,981.72

Finding the Fourth Proportional to 128,124,679.23, 176,811,114.40 and 69,385,981.72

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Solution

The fourth proportional to 128,124,679.23, 176,811,114.40 and 69,385,981.72 is: 95,752,144.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,124,679.23 : 176,811,114.40 = 69,385,981.72 : x
  2. Step 2: Convert to fraction form
    128,124,679.23/176,811,114.40 = 69,385,981.72/x
  3. Step 3: Cross multiply
    128,124,679.23x = 176,811,114.40 × 69,385,981.72
  4. Step 4: Simplify right side
    128,124,679.23x = 12,268,212,751,651,228
  5. Step 5: Solve for x
    x = 12,268,212,751,651,228/128,124,679.23
  6. Step 6: Final answer
    x = 95,752,144.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.